2-39. M1088 TRACTOR AND TRAILER COUPLING/UNCOUPLING
(c) Place one wheel chock (5) in front of one trailer wheel and the other wheel chock
in back of the opposite trailer wheel when parked on level ground.
(6) Prepare trailer for uncoupling (refer to Operators Manual for trailer).
(7) Lower trailer landing gear (refer to Operators Manual for trailer).
Perform step (8) if lock release handles cannot be moved.
(8) Apply trailer brakes using trailer handbrake control (6) and move M1088 Tractor
backward slightly to relieve pressure on fifth wheel coupler jaws.